Transcript I. Newton`s Laws of Motion

Motion & Forces
I. Newton’s Laws of Motion
Newton’s First Law

Newton’s First Law of Motion
 An object at rest will remain at
rest
_________and
an object in
motion will continue moving at a
constant velocity unless acted
upon by a net _______.
Force
Inertia
 Also called the Law of _______.
http://www.astro.ucla.edu/~colbert/cci.gif
What is Inertia?
 Object’s
resistance to changing
position
 http://www.youtube.com/watch?v
=8zsE3mpZ6Hw&safety_mode=tr
ue&persist_safety_mode=1
Newton’s Second Law
Newton’s Second Law of Motion
 The acceleration of an object is
directly proportional to the net
force acting on it and inversely
mass
proportional to its ________.
F = ___
a
m x ___
http://scratch.mit.edu/projects/MsMillersClass/297225
Newton’s Third Law
 Newton’s
Third Law of Motion
 When one object exerts a
force on a second object, the
second object exerts an
equal but __________
opposite
______
force
on the first.
http://www.youtube.com/watch?NR=1&v=ur40O6n
QHsw&feature=endscreen
Which Law????
1.
2.
3.
4.
5.
A VW beetle stopped at a red light lunches forward
when a SUV strikes it from behind.
As the large dog jumps from the boat to the pier,
the boat floats in the opposite direction.
In football running backs are generally smaller
than tackles and guards because the use their
lighter mass to get to the outside of the line.
Race cars are built of light weight materials for
greater acceleration during racing.
During a wreck the man lunged forward toward the
windshield until his progress was halted by the air
bag.
 http://www.youtube.com/watch?v
=vVd1tezgVK8&feature=related&
safety_mode=true&persist_safety
_mode=1
 http://www.youtube.com/watch?v
=8zsE3mpZ6Hw&feature=related
&safety_mode=true&persist_safe
ty_mode=1
 http://teachertech.rice.edu/Partici
pants/louviere/Newton/law1.html